0000004633 00000 n It is 2-4” (4.8-9.6 cm) in diameter. APHIS. Fact Sheet: Giant Hogweed (Heracleum mantegazzianum) (2014) (PDF | 334 KB) New Hampshire Department of Agriculture, Markets, and Food. 0000002099 00000 n National Genetic Resources Program. 0000007013 00000 n Description: Giant Hogweed is a member of the parsley or carrot family (umbelliferae). Giant hogweed seeds can survive in the soil seed bank for more than 5 years. Giant Hogweed (Heracleum mantegazzianum) is a perennial plant and a member of the carrot family. Seeds generally fall at the base of the parent plant but survive transport by water and this is the main means of seed dispersal. Date Posted 08/31/2020. European and Mediterranean Plant Protection Organization. Giant Hogweed. The leaves and flowers are very similar to that of cow parsley and the identification of Giant Hogweed is often confused for it. 0000012957 00000 n Gian hogweed can grow near roads and trails. Common Name: Giant Hogweed Scientific Name: Heracleum mantegazzianum Sommier & Levier Family: Apiaceae Description: A biennial or perennial herb in the carrot family growing to 15’ tall, with a taproot or fibrous roots. It is generally the species that is thought of when referring to invasive hogweeds. Heracleum mantegazzianum Sommier & Levier (ITIS), Produces toxic sap that can cause skin irritation and blindness (Gucker 2009). Its presence along river Weed Science. PA Noxious Weed Alert: Giant Hogweed (PDF | 1.31 MB), Noxious, Invasive and Poisonous Plant Program Publications, Giant Hogweed: Identification and Control (Sep 2020), Weed Control in Natural Areas in the Western United States: Giant Hogweed (2013) (PDF | 218 KB), New York Sea Grant Fact Sheet - Giant Hogweed (. 0000009806 00000 n 0000003275 00000 n 0000008341 00000 n Integrated Taxonomic Information System. Seeds are dispersed by wind or by water. Before sharing sensitive information online, make sure you’re on a .gov or .mil site by inspecting your browser’s address (or “location”) bar. Ontario's Invading Species Awareness Program (Canada). Plant Pest Risk Assessment for Giant Hogweed, Invasive Plants in Pennsylvania: Giant Hogweed (PDF | 180 KB), King County (Washington) Noxious Weed Control Program - Giant Hogweed. W:Sonya/Letters/Giant hogweed fact sheet CONTROL Giant hogweed is very difficult to eradicate. 0000241029 00000 n 0000001506 00000 n Federal government websites always use a .gov or .mil domain. The https:// means all transmitted data is encrypted — in other words, any information or browsing history that you provide is transmitted securely. 0000241388 00000 n Federal Noxious Weed Disseminules of the U.S. - Fact Sheet: Invasive Plant Atlas of the United States - Giant Hogweed, New York Invasive Species Information - Giant Hogweed, Non-native Species Information: Giant Hogweed, Conservation Practice Job Sheet VT-315 - Giant Hogweed (PDF | 125 KB), New Hampshire's Prohibited Invasive Plant Fact Sheets. Virginia Cooperative Extension. If a person gets the sap on their skin and their skin is exposed to sunlight it can cause chemical burns. USDA. 0000175558 00000 n It is known to grow in freshwater wetlands, grasslands, dis-turbed areas, urban areas, and gardens. Title: Microsoft Word - Giant hogweed.doc Author: hbutalla Created Date: 2/14/2006 9:59:59 AM This is very similar-looking to giant hogweed but is much smaller. 343 0 obj <> endobj Habitat Morphology It develops a thick hollow stem that can grow up to 15-20’ (4.3-5.8m) tall with purple splotches and stiff bristles. 0000007125 00000 n Home and Garden Information Center. Invasive Species Fact Sheet - Giant Hogweed (Heracleum mantegazzianum) Where does Giant Hogweed come from? This plant only reaches a maximum height of 2 metres (6ft 7) and the symmetrical flower heads only reach 20cm across. Pennsylvania Department of Conservation and Natural Resources. Connecticut Invasive Plant Working Group. Giant hogweed is a short lived herbaceous biennial that dies after flowering (monocarpic). 2009. Giant hogweed requires disturbance to estab-lish so it is important to maintain/restore desirable vegetation in habitats suitable for invasion. 0000013992 00000 n 0000007918 00000 n <<9B8A271E3ED23E4EBDE8723E035022EE>]>> Nuisance & Invasive Species - Giant Hogweed: Do Not Touch This Plant! 0000002444 00000 n Giant hogweed occurs in the following Canadian provinces: Giant hogweed (Heracleum mantegazzianum) is a member of the carrot or parsley family, Apiaceae (Umbelliferae). Giant Hogweed has large, flat-topped to slightly dome-shaped flower and seed head and a bumpy or bristly stem. EDRR Fact Sheet Randy G. Westbrooks, U.S. Geological Survey. It invades old fields and native habitats such as open woodlands. PPQ. [Accessed Mar 19, 2015]. University of California. 0000007239 00000 n Giant Hogweed was introduced to the UK in the early 19th Century. Product names and formula-tions may vary from year to year. 0 Or, to display all related content view all resources for Giant Hogweed. Effects may include welts, rashes, and blistering, followed by pigmented scarring that may persist for as long as six years. 0000121240 00000 n The main difference is the height and the fact that it can cause serious burns to the skin. Hollow stalks and stem produce sturdy bristles. CONCERN plants by monopolizing Giant hogweed can have negative impacts on both the environ-ment and human health. Giant hogweed has the potential to spread readily and grows along roadsides, ditches and streams. The clear, watery sap of giant hogweed contains toxins that cause phytophotodermatitis. Heracleum mantegazzianum. 0000002617 00000 n It is a garden ornamental from southwest Asia that is naturalizing in North America and becoming more common in southern and central Ontario. Water and Land Resources Division. Invasive Species, 2270 Old Penitentiary Road, Boise, ID, 83712, United States 0000240771 00000 n New York Department of Environmental Conservation. Grand River Conservation Authority – July 2010 GIANT HOGWEED (Heracleum mantegazzianum) FACT SHEET Habitat: Giant Hogweed is a herbaceous non-native plant originating in Asia. 0000012268 00000 n 0000015364 00000 n Virginia Tech; Virginia State University. ARS. 0000176030 00000 n Impacts: Giant hogweed outcompetes native plant species for habitat. 0000005416 00000 n It prefers moist, disturbed soil and Giant hogweed's stem can range from 10-15 cm in diameter with course hairs. It is a long term project, possibly taking 5 to 10 years, if dealing with an established growth. Except for its size, the plant can be mistaken for a number of native, noninvasive plants such as cow parsnip (Heracleum lanatum), Angelica (Angelica atropurpurea), and poison hemlock (Conium maculatum). 0000241861 00000 n The .gov means it’s official.Federal government websites always use a .gov or .mil domain. Announcing New Invasive Plant Fact Sheets Series. 0000004083 00000 n 0000183810 00000 n 0000005315 00000 n giant hogweed. xref Before sharing sensitive information online, make sure you’re on a .gov or .mil site by inspecting your browser’s address (or “location”) bar. European Network on Invasive Alien Species. 0000002281 00000 n Virginia Tech researchers who helped identify the dangerous Giant Hogweed plants in Clarke County, Virginia, want residents to stay on the lookout for the plant with toxic sap that can cause severe burns — but also stressed that the weeds are believed to have been planted intentionally decades ago and haven’t spread in the years since. Giant hogweed can grow up to 15 feet tall and produce large clusters of white flowers. Do not purchase and grow Giant hogweed plants or seeds. Heracleum mantegazzianum. It is not known to be present in Minnesota and is a prohibited noxious weed on the eradicate list . Plant Industry. 0000010200 00000 n GIANT HOGWEED Heracleum mantegazzianum Sommier & Levier Native Origin: Europe- introduced as an ornamental or spice Description: Giant hogweed is a biennial or perennial herb in the carrot family (Apiaceae), growing 15 to 20 feet in height with stout dark reddish-purple stems and spotted leaf stalks. 0000196319 00000 n 0000112515 00000 n 0000010805 00000 n phytophotodermatitis). Department of the Environment and Energy. National Invasive Species Information Center, Virginia Tech Scientists who Identified Dangerous Giant Hogweed in Clarke County Hopeful That it will be Contained (Jun 18, 2018), Early Detection & Distribution Mapping System (EDDMapS) - Giant Hogweed, Pest Tracker - Survey Status of Giant Hogweed, YouTube - Giant Hogweed: A Herculean Weed with Power, Factsheet - Giant Hogweed (Mar 2017) (PDF | 758 KB), Fact Sheet: Giant Hogweed (Jan 2014) (PDF | 804 KB), Alaska Exotic Plants Information Clearinghouse (AKEPIC): Species Biography - Giant Hogweed (Feb 7, 2011) (PDF | 235 KB), NOBANIS: Invasive Alien Species Fact Sheet -. 0000006264 00000 n Grows in moist soil, especially in ditches and ravines in both sun and shade. 0000005127 00000 n Center for Invasive Species and Ecosystem Health. GRIN-Global. Includes species listed as a Federal Noxious Weed under the Plant Protection Act, which makes it illegal in the U.S. to import or transport between States without a permit. Purdue University Extension. University of Georgia. University of Connecticut. It is an invasive, alien plant that originates from the Caucasus Mountains in west central Asia where it grows in subalpine meadows and forest edges. Washington State Noxious Weed Control Board. The leaves are extremely large growing to … USDA. 0000161908 00000 n Giant hogweed, or Heracleum mantegazzianum is considered a noxious weed by the federal government. Here is a fact sheet provided by the Nova Scotia Department of Natural Resources on giant hogweed and its associated risks. 0000112979 00000 n Site-specific control methods need to match local situations. Alaska Center for Conservation Science. It is a garden ornamental from southwest Asia that is naturalizing in North America and becoming more common in southern and central Ontario. Great Britain Non-Native Species Secretariat. It is a member of the Apiaceae (Umbelliferae) family of plants, commonly known as the Carrot or Parsley family. The .gov means it’s official. ����W`{z��s�,2R:����LLv,����ý�-��O x�b```f``�f`c`PX� Ā B��,.��=*�����|IǺ�"���9}�S�5�'`�� University of Alaska - Anchorage. The large flat cluster, umbel, of small white flowers is reminiscent of Queen Anne’s Lace, but giant hogweed’s umbel is much larger, growing up to 2½â€™ in diameter. 0000014726 00000 n Alberta Invasive Species Council (Canada). Giant hogweed resembles some of our native species such as Angelica, Queen Anne’s Lace, and Cow parsnip. 0000010947 00000 n USA. Pesticide product registration is renewed annually. Its stems aren’t blotchy like those of giant hogweed (their colour graduates smoothly from green to purple) and are ridged, hollow and hairy. (RU�}b�|{Q!�d�-����%�|,>ȝ.Ѩx99��*�TK$P�k�U��I����{uy��L��u�BJ�&.`�KXZZZGG���8����P�. Brushing against or breaking the plant releases sap that, combined with sunlight and moisture, can cause a severe burn within 24 to 48 hours. Invasive Species Alert Sheet Giant Hogweed. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory. With recent efforts to combat invasive plants in woodlands, Penn State Extension has released new resources to help with identification and control. %%EOF Noxious weed seed and plant quarantine U.S. Weed Information; Heracleum mantegazzianum . Except ... rent as of the date of the fact sheet. 0000010974 00000 n Gucker, C.L. Unlike native species, Hogweed can grow up to 5 metres tall and has an herbaceous stem 5 to 10 centimetres in diameter. 0000011460 00000 n King County Department of Natural Resources (Washington). 0000161570 00000 n It was likely introduced to North America as an ornamental garden plant. Denial of seed production, with appropriate site rehabilitation, for 4 to 5 years usually eradicates limited local populations. Division of Plant Industry. 401 0 obj <>stream Weed Research and Information Center. Australian Government. 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